Pump



J. n. KELLER.

PUMP

APPLICATION FILED OCT. 19, I920.

Patented Nov. 2 1922.

INVENTOR. LIafiIIHKEIIEZ: BY 6%. 4, M

ATTORNEY Patented Nov. 28, 1922.

STATES PA esic PUMP.

Application filed October 19, 1920. Serial 1\T0. 417,997.

, which may be readily inserted within a well casing and disposed at any level therein;

thereafter operating on a minimum stroke to produce a maximum elevation of the liquid within the casing with a minimum power exertion.

The present invention contemplates the.

use of a pump casing fitted with upper and lower sections conforming'to the interior of a well casing, said pump casing being further provided with sets of reciprocating pistons operating in synchronism to draw the liquid into the pump cylinder and elevate it therefrom.

The invention is illustrated by Way of example in the accompanying drawings, in which- Fig. 1 is an enlarged view in vertical section showing a fragmentary portion of a well casing with the present plied thereto.

Fig. 2 is a fragmentary view in vertical invention apsection and elevation illustrating the position of the pump within a well casing, and a form of mechanism by which the pistons may be reciprocated.

Fig. 3 is an end view in transverse section through the pump showing the manner in which the annular compartment around the pump cylinder is subdivided longitudinally. 7

Referring more particularly to the drawings 10 indicates a well casingfwithin which a pump structure 11 is positioned, it being understood that the pump structure is the subject of the present invention. This pump comprises a central tubular cylinder 12 which is of smaller diameter than the diameter of the casing and accommodates an exterior sleeve 13, which is disposed between the pump cylinder 12 and the well casing 10 and forms an annular outer chamber 14 and an inner chamber 15. ends of the pump cylinder 12 are provided The opposite with bolting flanges 16 carried by collars or annular members which members are preferably threaded to the exterior of the cylinder and have an enlarged flanged portion substantially conforming with the interior diameter of the well casing. Valve housings l7 and 18 are rigidly secured to the ends of these bolting flanges. The valve chambers are of a diameter substantially that of the well casing. The upper valve chamber 18. is formed with a compartment 19, within which flapper valves 20 and 21 are mounted. These valve members seat over port openings 22 and 23 which openings communicate with the annular chamber 15 around the pump cylinder and within the outer sleeve 13. The valve housing 18 also provides a cylinder head 24 for the upper end of'the pump cylinder 12. This head is fitted with a stufling box 25 through which a tubular piston rod 26 anda central piston rod 27 extend. The upper end of the valve housing 18 is formed with an opening 28 communicating with a pump casing 29, through which the liquid -may be elevated from the pump. The lower valve housing 17 is formed with two valve chambers 30 and 31. These valve chambers are fitted with flapper valves 32 and 33, which are intended to close valve ports 34 and 35. These ports communicate directly with the well casing and allow a flow of liquid upwardly from the casing into the valve chambers 30 and 31. The upper end of the valve housing 17 providesa cylinder head 36 for the lower end of the pump cylinder 12. This end of the valve housing is also formed with ports 37 and 38, which communicate with the annuular chamber 15 around the pump cylinder. Throughout the length of the pump cylinder are distributed a pluralityof eduction and induction openings as shown in Fig. 1. Two openings 39 and 40 are formed on one side of the cylinder and three openings 41, 42 and 48 are formed through the opposite side of thecylinder. The openings on the two sides of the cylinder are, staggered with relation to each other and are equally spaced for a purpose to be hereinafter set forth. The opening 42 is substantially midway the length of the pump cylinder, while the openings 41 and 43 are at the extreme ends of the same side of the cylinder. The openings 89 and 40 are midway between the openings 41 and 42 and 42 and 43 respectively. Reciprocally mounted within the pump cylinder are pistons 44, 45, 46 and 47. The piston 44 is directly secured to the end of the tubular piston rod 26. Connecting rods 48 secure the piston 46 in rigid spaced relation to the piston 44. The piston is secured to the end of the central piston rod 27 which rod is formed with an extension to which is rigidly secured the piston 47. It is intended that the distance from piston 44 to the complementary piston 46, and from piston 45 to its complementary piston 47, will be the same, although it will be noted that these two sets of pistons will have relative movement.

The telescoping piston rods 26 and 27 may be operated by any desired mechanism. although in the drawings a toggle lever structure is shown. This mechanism comprises a cross head 50. The cross head 50 is slidable within suitable guides 51 and operated from a prime mover by pitmanrod 52. The

outer end of the cross head carries two parallel fulcrum pins 53 and 54. Pivotally mounted upon said pins are toggle links 55 and 56 respectively. These links are secured at their outer ends to piston rod levers 57 and 58, which levers are in turn pivotally secured to the cross head. The lever 57 is pivoted to a collar 59 fixed on the end of the central piston rod 27, while the lever 58 is fitted with a collar carried by the upper end of the tubular piston rod 26. An examination of this mechanism will show that reciprocal movement of the cross head 50 will produce opposite movement of the central piston rod 27 and the tubular piston rod 26.

In operation of the present invention the operating mechanism isset up above the ground and in such a position relative to the vertical axis of a well casing as to insure that the collars 59 and. 60 will be in vertical alignment, and that the reciprocable path of travel of the cross head will be at right angles to the axis of the casing. The pump may then be assembled in the unit shown and thereafter lowered into the easing, at which time it is equipped with the pump casing 29 by which the pump is suspended. Assuming that the operating mechanism is in the position shown in Fig. 2..

and that the cross head is ready to move in the direction of the arrow a, it will be seen that the telescoping rod 27 will be forced downwardly and that the central rod will be forced upwardly. This will cause the pistons 44 and 46 to be lowered, at which time the pistons 45 and 47 will be lifted. Downward movement of the pistons 44 and 46 against the upward movement of the pistons 45 and 47 will cause theliquid there between to be ejected through the side openings 39 and 40. This action will close the valve 35 and open the valve 21, causing the liquid to be elevated. At this same time pistons 45 and 46 will be separated to produce a suction action through the opening 42 which action will elevate the valve 32 and close the valve 20. Suction action will also be taking place between the cylinder heads and the adjacent pistons through the openings 41 and 48. At the completion of this stroke a reversal of direction will take place to eject the liquid from the ends of the cylinders and in the space between the pistons 45 and 46. This produces a closing of the valve 32 and an opening of the valve 20.

It will thus be seen that by the arrangement here disclosed, the capacity of a pump may be increased while its stroke will be only one-half that of the ordinary pump designed for the same capacity, and that by the mechanism here shown a continuous reciprocating pump may be maintained in operation at any depth within a well without the great possibility of requiring repair and at a-very low operating cost.

lVhile I have shown the preferred form of my invention as now known to me, I wish it understood that various changes in the construction, combination and arrangement of parts may be made by those skilled in the art without departing from the spirit of the invention as claimed.

Having thus described my invention, what Iclaim and desire to secure by Letters Patent isi 1. In combination with a well casing a pump structure comprising a pump cylinder, a plurality of pistons within said cylinder enlarged cylindrical valve housings at the opposite ends of said cylinder and substantially conforming to the inner diameter of the well casing and spacing the cylinder from the said well casing, and valve means in said housings whereby simultaneous alternate reciprocation of the pistons will act to continuously draw a fluid through the cylinder and elevate it within the casing.

2. In combination with a well casinga pump structure comprising a pump, cylinder, a plurality of pistons within said cylinder, enlarged substantially cylindrical valve housings at the opposite ends of said cylinder and substantially conforming to the inner diameter of the well casing and spacing the pump cylinder therefrom, valve means in said housings whereby simultaneous alternate reciprocation of the pistons will act to continuously draw a fluid through the cylinder and elevate it Within the casing, and means for simultaneously and alternately reciprocating said pistons.

3. In combination with a well casing a pump structure including a pump cylinder, valve housings at the opposite ends thereof and spacing the pump cylinder from the well casing, of an outside diameter substantially agreeing to the inside diameter of the Well casing, a jacket surrounding the pump cylinder and spaced a distance therefrom to form an annular compartment, valve ports in the housings communicating with said compartment, and ports arranged along the opposite sides of the cylinder whereby simultaneous alternate reciprocation of the pistons will act to alternately draw liquid-from the well casing through the lower valves and eject the liquid through the upper valves.

4. In combination with a well casing a pump cylinder disposed therein, and formed with opposite closed ends, a pair of telescoping piston rods extending throughone of said ends and up through the well casing, enlarged valve housings secured to the opposite ends of the cylinder and substantially conforming to the inner diameter of the well casing and spacing the pump cylinder from the well casing, a discharge pipe in communication with the upper valve housing and through which the piston rods extend, pairs of valves in the valve housings adapted to be alternately opened by alternate movement of the pistons as liquid is ejected through the side ports of the pump cylinder and sets of pistons secured to the separate telescoping piston rods and disposed in alternate spaced relation to each other. Y

5. The combination of a well casing, a pump cylinder disposed therein, substantially cylindrical valve housings arranged at the ends of the pump cylinder and fitting the well casing and spacing the pump cylinder therefrom, annular members or 001- lars mounted on the pump cylinder at the ends thereof and secured to the said housings, a sleeve arranged concentric with the pump cylinder in spaced relation with the same and mounted on and carried by the said collars or members, a plurality oi pistons operating within the cylinder, and valves mounted within the said valve housings. 7

JOHN D. KELLER.

Witnesses:

W. A. BRANDENBURGER, I. A. Rosnvnsnn. 1 

